add support for Redis 6 ACL username based authentication

- see: OpenIDC/mod_oauth2#63
- bump to 1.6.1dev

Signed-off-by: Hans Zandbelt <hans.zandbelt@openidc.com>

Author: zandbelt

ChangeLog

@@ -1,3 +1,7 @@
+03/04/2024
+- add support for Redis 6 ACL username based authentication; see: OpenIDC/mod_oauth2#63
+- bump to 1.6.1dev
+
 12/06/2023
 - add support for the OAuth 2.0 Client Credentials grant type
 - use libcurl version macro that works on older platforms

configure.ac

@@ -1,4 +1,4 @@
-AC_INIT([liboauth2],[1.6.0],[hans.zandbelt@openidc.com])
+AC_INIT([liboauth2],[1.6.1dev],[hans.zandbelt@openidc.com])
 
 AM_INIT_AUTOMAKE([foreign no-define subdir-objects])
 AC_CONFIG_MACRO_DIR([m4])

src/cache/redis.c

@@ -33,6 +33,7 @@ typedef struct oauth2_cache_impl_redis_t {
 	oauth2_ipc_mutex_t *mutex;
 	char *host_str;
 	oauth2_uint_t port;
+	char *username;
 	char *passwd;
 	redisContext *ctx;
 } oauth2_cache_impl_redis_t;
@@ -68,6 +69,9 @@ static bool oauth2_cache_redis_init(oauth2_log_t *log, oauth2_cache_t *cache,
 	v = oauth2_nv_list_get(log, options, "port");
 	impl->port = oauth2_parse_uint(log, v, 6379);
 
+	v = oauth2_nv_list_get(log, options, "username");
+	impl->username = v ? oauth2_strdup(v) : NULL;
+
 	v = oauth2_nv_list_get(log, options, "password");
 	impl->passwd = v ? oauth2_strdup(v) : NULL;
 
@@ -109,6 +113,8 @@ static bool oauth2_cache_redis_free(oauth2_log_t *log, oauth2_cache_t *cache)
 
 	if (impl->host_str)
 		oauth2_mem_free(impl->host_str);
+	if (impl->username)
+		oauth2_mem_free(impl->username);
 	if (impl->passwd)
 		oauth2_mem_free(impl->passwd);
 
@@ -227,8 +233,13 @@ static redisReply *_oauth2_cache_redis_command(oauth2_log_t *log,
 			break;
 
 		if (impl->passwd != NULL) {
-			reply =
-			    redisCommand(impl->ctx, "AUTH %s", impl->passwd);
+			if (impl->username != NULL)
+				reply =
+				    redisCommand(impl->ctx, "AUTH %s %s",
+						 impl->username, impl->passwd);
+			else
+				reply = redisCommand(impl->ctx, "AUTH %s",
+						     impl->passwd);
 			if ((reply == NULL) ||
 			    (reply->type == REDIS_REPLY_ERROR))
 				oauth2_error(